- Ecu diagnostic forums how to#
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- Ecu diagnostic forums software#
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- Ecu diagnostic forums series#
If a fault code reappears after clearing the fault codes, fix the problem, or change the faulty component. If the value is still incorrect, recheck the value after changing the idle stepper motor. Otherwise, turn off the engine for 15 seconds, and recheck the value. With the engine off, the desired motor step should read 135. If the reading is different, recheck the reading after changing the MAP/MAT sensor. With the engine off, the intake air temperature should read the value of the ambient air temperature. If the reading is different, recheck the reading after changing the coolant temperature sensor. With the engine off, the coolant temperature should read the value of the ambient air temperature. The battery voltage should normally read between 12.5 volts to 13.0 volts, with the engine off. With the engine off, the barometric pressure should read the actual atmospheric pressure. Throttle position values should smoothly transition from closed throttle, to the wide open throttle position. The wide open throttle position should read 100. The closed throttle position should read zero.
Ecu diagnostic forums software#
I think this is a false negative thrown by a stuttering ECU which put the car into limp.Diagnostic Process for Solving Typical Engine Problemsĭiagnosis of engine problems is facilitated by using either an engine scan tool, or PCHUD software on a laptop computer.Ĭompatible Scan Tools for Delphi MT05 ECUĬonnect the scan tool/computer to the diagnostic port, and check the system with the engine off. The only code in the ECU was a U0101 - Lost communication with TCM - Permanent. So the ECU was either in an error state where communications could not happen, or an error state had been thrown which instructed it not to communicate. I tried it and the ECU really did reset and both my scanners were then able to connect.
Ecu diagnostic forums series#
A carefully times series of actions on the start button and the accelerator pedal.
Ecu diagnostic forums how to#
Whilst in the process of removing the glove box to disconnect and extract the ECU to send for diagnosis and repair, I came across a YT vid showing how to reset the ECU of an Infiniti G series housing a VQ37ED. Probably should mention that I am in the UK and it is a Zed manufactured for the UK domestic market Could the jump have damaged something like the alternator perhaps? I have never heard of that myself, but it seems like it might be at least remotely possible.įinally, if I have to have the car recovered back to Nissan again, does anyone know of a way to put the auto gearbox into neutral so I can roll it out of my garage? An embarrassing tale that I won't go in to My wife drove to where I was armed with jump leads and the car jumped fine. This could, however, be because the ECU needs to be cleared which I cannot do.įor further consideration: About three days before the first incident, I accidentally left the lights on and flattened the battery.
Given that Nissan seemed to correct the problem temporarily with a new battery (which I have trickle charged to full) it seems logical that this is an electrical power problem, maybe not enough amps available to draw upon for ignition? However, I have tried a new, unused larger battery for my other car without success. The car goes into Accessory mode fine, but when I try to start it or simply press START a second time, all dash lights come on, the engine cooling fan fires up and most of the dash warning lights illuminate. Unfortunately I have not tried to connect to the ECU when the car is healthy so I don't know whether this car just won't talk to a non-Nissan authorised scanner or it won't talk because of this current problem.or, perhaps, because the ECU has been programmed to reject connections under certain conditions. So, the first question to my learned peers on this forum: does anyone now of an ECU state where it simply fails or rejects connections? They replaced it, cleared the ECU and gave me the car back.Īll was fine for about 200 miles and the exact same thing has happened again. In the end I had the car recovered to my nearest Nissan High Performance dealer who told me that there was a problem with the battery. Having disconnected the battery to try to 'reset' the ECU without success I called my breakdown provider (sorry, don't know what you call them in the U.S.) who was also unable to connect his scanner to the ECU. I know that both scanners are working as they can connect happily to my other car.
Ecu diagnostic forums for android#
I have two scanners, a wifi unit (Tacklife) attached to Torque Pro for Android and iCarsoft CR PLUS neither of which will talk to my ECU, both simply fail to acquire a connection over any of their pre-defined protocols. Once switched off it would no longer start. I have a 2011 370Z Roadster auto (32k miles) which recently went into 'limp'. I hope to be able to contribute as well as quiz. Hiya new to this forum, so first up 'hello' to all.